An object of mass 0.50 kg, hanging from a spring constant of 8.0 N/m,

1.An object of mass 0.50 kg, hanging from a spring with a spring constant of 8.0 N/m, is set into a simple harmonic motion. What is the maximum speed of the object if its maximum displacement is 0.10 m?? 0.20m/s0.40m/s0.80m/s1.60m/s

2.An object of mass 0.50 kg, hanging from a spring with a spring constant of 8.0 N/m, is set into a simple harmonic motion. What is the maximum speed of the object if its maximum displacement is 0.10 m? 选项： A、0.20m/s B、0.40m/s C、0.80m/s D、1.60m/s

3.An object of mass 0.50 kg, hanging from a spring with a spring constant of 8.0 N/m, is set into a simple harmonic motion. What is the maximum speed of the object if its maximum displacement is 0.10 m? 选项： A:0.20m/s; B:0.40m/s; C:0.80m/s; D:1.60m/s

4.A mass of 0.20 kg, hung from a spring with a spring constant of 80.0 N/m, is set into an up-and-down simple harmonic motion. If the mass is displaced from equilibrium by 0.10 m and released from rest, what is its speed when moving through the equilibrium point?选项： A:0; B:1.4 m/s; C:2.0 m/s; D:3.4 m/s

5.1) A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.6 cm for equilibrium it has a kinetic energy of 1.4 J and a spring potential energy of 2.2 J. What is the maximum speed of the mass during its oscillation (in m/s)? 选项： A、3.7 m/s B、4.7 m/s C、6.0 m/s D、6.3 m/s E、7.8 m/s

6.A 0.20-kg mass is oscillating on a spring over a horizontalfrictionless surface. When it is at a displacement of 2.6 cm forequilibrium it has a kinetic energy of 1.4 J and a spring potentialenergy of 2.2 J. What is the maximum speed of the mass during itsoscillation (in m/s)? A: 3.7m/s B: 4.7m/s C: 6.0m/s D: 6.3m/s E: 7.8m/s

7.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If a timer is started when its displacement is a maximum (hence x = 8 cm when t = 0), what is the displacement of the mass when t = 3.7 s? ( )选项： A:zero B:0.025 m C:0.036 m D:0.080 m E:0.095 m

8.A 0.20-kg mass is oscillating on a spring over a horizontal
frictionless surface. When it is at a displacement of 2.6 cm for
equilibrium it has a kinetic energy of 1.4 J and a spring potential
energy of 2.2 J. What is the maximum speed of the mass during its
oscillation (in m/s)? 选项： A、3.7
m/s B、4.7
m/s C、6.0
m/s D、6.3
m/s E、7.8
m/s

9.A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 450 N, then what maximum speed can the mass have if the string is not to break?选项： A:370 m/s; B:22 m/s; C:19 m/s; D:29 m/s; E:25.9 m/s; F:2.87 m/s; G:95 m/s

10.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?( ) 选项：A:40 N/m B:87 N/m C:126 N/m D:160 N/m E:190 N/m

11.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?( )选项： A:40 N/m B:87 N/m C:126 N/m D:160 N/m E:190 N/m

12.An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ×10^6 m. What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 × 10^6 m from the surface of this planet?选项： A:90 m/s^2; B:20 m/s^2; C:13 m/s^2; D:18 m/s^2; E:28 m/s^2; F:38 m/s^2

13.An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ×10^6 m. What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 × 10^6 m from the surface of this planet?选项： A:90 m/s^2; B:20 m/s^2; C:13 m/s^2; D:18 m/s^2; E:28 m/s^2; F:38 m/s^2; G:48 m/s^2

14.A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0Hz and an amplitude of 8.0cm.
If a timer is started when its displacement is a maximum (hence x=8cm
when t=0),
what is the
displacement of the mass when t=3.7s? 选项： A、zero B、0.025
m C、0.036
m D、0.080
m E、0.095
m

15.The motion of a piston in an automobile engine is nearly simple harmonic. If the 1-kg piston travels back and forth over a total distance of 10.0 cm, what is its maximum speed when the engine is running at 3 000 rpm?( ) 选项： A、3.93 m/s B、15.7 m/s C、7.85 m/s D、31.4 m/s E、1.66 m/s

16.

1) A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.6 cm for equilibrium it has a kinetic energy of 1.4 J and a spring potential energy of 2.2 J. What is the maximum speed of the mass during its oscillation (in m/s)?

17.A spring-mass system with m = 10 kg and k = 5000 N/m is subjected to a harmonic force of amplitude 250 N and frequency ω. If the maximum amplitude of the mass is observed to be 100 mm, find the value of ω.

18. A child with a mass of 20 kg moves at a speed of 18 km/h sat on a sledge with a mass of 5 kg. What is the total quantity of motion of the child-sledge combination? 选项： A:125 kg · m/s B: 100 N C:450 kg · m/s D:450 N E:360 kg · m/s

19.Two boys push a 5kg box on a frictionless floor. James pushes the box with a 10.0N force to the right. Louis pushes the box with an 8.0N force to the left. What is the magnitude and direction of the box’s acceleration?选项： A:0.4 m/s2 to the left; B:0.4 m/s2 to the right; C:1.6 m/s2 to the left; D:1.6 m/s2 to the right

20.A 20-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. If the block had been originally at rest and is free to move, what is its resulting speed?选项： A:9 m/s; B:18 m/s; C:90 m/s; D:900 m/s; E:60 m/s; F:600 m/s

21.A constant net force of 500 N moves a 1,000-kg car 100 m. If the car was initially at rest, then what is the car’s final velocity?选项： A:1 m/s; B:5 m/s; C:10 m/s; D:20 m/s

22.Someone exerts a force F=110 N directly upon the axle of the pulley as shown. Consider the pulley and string to be massless and the bearing frictionless. Two objects, m1 of mass 1.2 kg and m2 of mass 1.9 kg, are attached as shown to the opposite ends of the string, which passes over the pulley. The object m2 is in contact with the floor. What is the acceleration of the pulley? (g=9.8 m/s2) 选项：A、47.6 m/s2B、37.6 m/s2C、27.6 m/s2D、17.8 m/s2

An object of mass 0.50 kg, hanging from a spring constant of 8.0 N/m, is set into a sample harmonic motion. What is the maximum speed of the object if its maximum displacement is 0.1m?（ ） 选项： A:0.2 m/s B:0.4 m/s C:0.8 m/s D:1.6 m/s

An object of mass 0.50 kg, hanging from a spring constant of 8.0 N/m, is set into a sample harmonic motion. What is the maximum speed of the object if its maximum displacement is 0.1m?（）
选项：

A:0.2 m/s
B:0.4 m/s
C:0.8 m/s
D:1.6 m/s